From Wikipedia:
A doodle is a type of sketch, an unfocused drawing made while a person's attention is otherwise occupied. Doodles are simple drawings that can have concrete representational meaning or may just be abstract shapes.
Stereotypical examples of doodling are found in school notebooks, often in the margins, drawn by students daydreaming or losing interest during class. Other common examples of doodling are produced during long telephone conversations if a pen and paper are available. ...
I've been drawing for as long as I can remember. When I was little I took great inspiration from the Sunday comics and comic books. As is typical of many teenagers, this progressed into doodling during class.
Apart from your standard core classes in college, I've never benefited from extensive formal education in drawing or art -- at this point, such is financially infeasible. At any rate, I'm still doodling. Even now, I tend to prefer drawing in a standard college-lined notebook with a simple pen.
Anyways, this is yet another "art blog", to which I'll be posting my doodlings and drawings from time to time. I hope you enjoy.